package network;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: Microsoft
 * Date: 2023-08-03
 * Time: 17:05
 */
public class TcpEchoClient {
    private Socket socket = null;

    public TcpEchoClient(String serverIP,int port) throws IOException {
        socket = new Socket(serverIP,port);//这个操作就相当于让客户端和服务器建立tcp连接
    }

    public void start() {
        Scanner scanner = new Scanner(System.in);
        try(InputStream inputStream = socket.getInputStream();
            OutputStream outputStream = socket.getOutputStream()) {
            PrintWriter printWriter = new PrintWriter(outputStream);
            Scanner scannerFromSocket = new Scanner(inputStream);

            while (true) {
                //1.从键盘上读取用户输入的内容
                System.out.print("->");
                String request = scanner.next();

                //2.把读取的内容构造成请求，发送给服务器
                printWriter.println(request);//注意这里的发送是带换行的
                printWriter.flush();//手动刷新缓冲区
                //3.从服务器读取响应内容
                String response = scannerFromSocket.next();//这样就把服务器返回的响应进行读取了
                //4.把响应内容显示到控制台上
                System.out.printf("req:%s resp:%s\n",request,response);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) throws IOException {
        TcpEchoClient client = new TcpEchoClient("127.0.0.1",9090);
        client.start();
    }
}



































